Hightstown, New Jersey, United States [Borough]; population was 5,126 in 1990; housing units was 2,151 in 1990; location is 40°16'N 74°32'W; land area is 1.24 square miles (791 acres); water area is 0.03 square miles (17 acres); FIPS code is 31620 [SourceCBP]